Re: JD 4110 won't charge battery

Yes, the voltage at the battery is around 12.5. I have tested the alternator per the shop manual and it appears to be working as well. The battery charges normally. I have replaced the voltage regulator. The alternator on this unit is a 20A alternator. I have done quite a few of the tests and have not located a problem. Why does the alternator light not come on? Thanks for the response.

Re: JD 4110 won't charge battery

There is a small plastic box mounted on bracket over the radiator. There will be a plug in harness just disconnect it from the module. If the timer goes bad it can draw a continuous current to the glow plugs while the tractor is running and the alternator is unable to keep up and recharge the battery. Tractor still will operate fine without timer plugged in circuit. You can manually activate the glow plugs still by overiding the start circuit pull up pto switch or put range selector in gear and turn key to start. It is fairly expensive part to replace.

Re: JD 4110 won't charge battery

Originally Posted by DFB

There is a small plastic box mounted on bracket over the radiator. There will be a plug in harness just disconnect it from the module. If the timer goes bad it can draw a continuous current to the glow plugs while the tractor is running and the alternator is unable to keep up and recharge the battery. Tractor still will operate fine without timer plugged in circuit. You can manually activate the glow plugs still by overiding the start circuit pull up pto switch or put range selector in gear and turn key to start. It is fairly expensive part to replace.

That makes sense - I will check it out when I get home. Thanks for the info.

Re: JD 4110 won't charge battery

Well, when I disconnected the relay completely - the tractor would not start. I had to leave 2 of the 3 leads and then it would start. Either way, no increase in voltage at the battery. I probably will need to replace it to see if that is the issue. Anything else I can check? or ideas? Thanks